Michigan's average gas price is $3.70 per gallon, according to AAA.MLive File Photo

Michigan’s average gas price rose 32 cents over the week to an average of $3.70.

That’s up 17 cents from the same time last year, according to Dearborn-based auto club AAA Michigan.

Fuel prices shot up 17 cents nationally, to an average of $3.52 per gallon.

Analyst Patrick DeHaan said gas stations were justified in raising their prices since the cost of wholesale gasoline went up, but he couldn’t fully explain the rise in wholesale prices.

“It’s very interesting how the market has propelled so much higher so quickly,” said DeHaan, senior petroleum analyst with GasBuddy.com.

The market tends to be pretty quiet this time of year since demand is lower. Yet wholesale prices climbed 45 cents per gallon, with no smoking gun in sight.

A few factors — such as rising oil prices, a slight decline in regional supply and a small refinery explosion in Ohio last week — could have contributed to an increase, but not to the degree that’s played out in the marketplace.

“This mysterious rally in wholesale gasoline prices usually waits a month or two,” he said, adding that sentiment over the improving stock market may have carried over into commodities.

Michigan has the 10th highest average gas price in the nation in a list that includes Washington, D.C. Hawaii has the highest average most expensive fuel at $4.14 per gallon, while Wyoming has the lowest average price of $2.94 per gallon.

The Marquette area’s average price of $3.59 is the lowest compared to nine other metro areas in AAA’s Fuel Gauge Report. Jackson’s average price of $3.76 is the highest among the metros. (See more Michigan metros here.)

AAA bases its report on a survey of 2,800 Michigan gas stations. Today’s price report is based on the last credit card transaction at each station on Sunday.

One of the lowest prices posted on MichiganGasPrices.com this morning was $3.39 in Wyandotte. The highest price reported was $3.99 in Romulus.

The website, part of GasBuddy.com, reports real-time user-submitted data on gas prices at specific stations.